The devil seems to refer to several evil spirits and on occasion one devil is in charge. In some Bibles devil is changed to demon. 1 Enoch may very well tell who is in charge of these lesser devils or perhaps equal but lower in rank. Matthew 25:41
Then shall he say also unto them on the left hand, Depart from me, ye cursed, into everlasting fire, prepared for the devil and his angels:
Matthew 25:40-42 (in Context) Matthew 25 (Whole Chapter)